Non-living factors such as light intensity, moisture, pH and temperature., Form when fertilisers leach into fresh water, adding extra, unwanted nitrates that increase algal populations., The range of species in an area., The use of natural predator or pathogen to control pests and used as an alternative to using pesticides., Living factors such as competition for resources, disease, food availability, grazing and predation., Stage 2 of photosynthesis where ATP and enzymes are used to fix hydrogen with carbon dioxide to produce glucose., An organism that only eats animals., All the organisms living in a particular habitat, An organism that must consume other organisms to gain energy., Consists of the community living in a particular habitat and the non-living components with which the organisms interact., Provide nitrates which increase crop yield., The flow of energy from one organism to another., A series of inter-connected food chains., Crops with a ‘foreign’ gene added. Used to reduce the use of fertilisers and pesticides., Place where an organism lives, An organism that only eats plants., Species that by their presence or absence indicate environmental quality/levels of pollution., Occurs among individuals of different species for one or a few of the resources they require., Occurs among individuals of the same species and is for all resources required., Prevents the exchange of genes between sub-populations during speciation. Can be geographical, ecological or behavioural., Used to measure light intensity. , Stage 1 of photosynthesis where light energy is trapped, water is split and ATP produced., Factors which limit the rate of photosynthesis and plant growth when in short supply., Spontaneous, random change to genetic material., The best adapted individuals in a population survive to reproduce., The role that an organism plays within a community., An organism that eats both plants and animals., Used by plants to produce amino acids which are synthesised into plant proteins., Chemicals used to kill animals and plants that reduce crop yield., Used to measure pH., The use of sunlight to produce sugar in plants., Used to sample ground living invertebrate abundance., The total number of one species., An organism that hunts and kills other animals., An organism that is hunted by a predator., A green plant that can produce its own food by photosynthesis., Show the relative quantity of energy at each stage in a food chain., Show the relative number of organisms at each stage in a food chain., Used to sample plant and slow-moving animal abundance and must be placed randomly., Used to measure soil moisture. , Formation of new species from a common ancestor., A group of interbreeding organisms that can produce fertile offspring., Produced from glucose (produced by photosynthesis) as an energy store, Produced from glucose (produced by photosynthesis) to build plant cell walls., Used to measure temperature., Genetic differences within a population which makes it possible for a population to evolve over time in response to changing environmental conditions..

N5 Biology Unit 3 definitions

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